KR102092753B1 - Heat recovery apparatus and method - Google Patents

Abstract

The present invention is connected to the inlet portion of the flow path of the heat exchange portion of the body portion, the heat exchange portion mounted on the body portion, the body portion disposed on the upper side of the open container, the supply portion for supplying heat exchange medium to the flow path , Heat recovery including a body part connected to the outlet of the flow path, a recovery part for recovering the heat exchange medium from the flow path, and a guide part formed in the body part to prevent departure of the body part seated on the top of the container As a device and a heat recovery method using the same, a heat recovery device and a heat recovery method capable of recovering residual heat from a high temperature container are proposed.

Description

Heat recovery device and heat recovery method {HEAT RECOVERY APPARATUS AND METHOD}

The present invention relates to a heat recovery device and a heat recovery method, and more particularly, to a heat recovery device and a heat recovery method capable of recovering and recycling residual heat from a high-temperature container.

The ladle is a container for storing and transporting high-temperature treatments. For example, the hot molten steel refined in the steelmaking process is placed in a ladle and transferred to a facility for a continuous casting process. The ladle is exposed to hot molten steel and undergoes thermal, physical and chemical erosion.

Therefore, the refractory reed is gradually eroded while repeating a series of processes for transporting molten steel. Accordingly, the ladle needs regular repairs, such as reinforcing the eroded part of the refractory kite at regular intervals, or removing the refractory kite and integral parts and constructing a new refractory softener.

On average, more than 1.5 ladles are repaired per day, and in order to repair the ladle, the ladle temperature must be cooled from about 1000 ° C to 200 ° C or less. At this time, a large amount of heat is wasted into the atmosphere.

The technology underlying the present invention is published in the following patent documents.

KR 10-2015-0053618 A KR 10-2014-0084558 A

The present invention provides a heat recovery device and a heat recovery method capable of recovering and recycling residual heat from a container at a high temperature.

The present invention provides a heat recovery device and a heat recovery method capable of stably seating the device on a container and preventing collision.

The present invention provides a heat recovery device and a heat recovery method that can select a different heat recovery method according to the temperature of the container.

The present invention provides a heat recovery apparatus and a heat recovery method capable of improving heat recovery efficiency by inducing forced convection and turbulence inside the container.

Heat recovery device according to an embodiment of the present invention, the upper body portion is disposed on the upper side of the open container; A heat exchange part mounted on a lower surface of the body part and having a flow path formed therein; A supply unit connected to the inlet of the flow path via the body portion and supplying a heat exchange medium to the flow path; A recovery unit connected to the outlet portion of the flow path via the body portion and recovering a heat exchange medium from the flow path; And a guide portion formed in the body portion so that the body portion does not deviate from the container.

A base formed to seat the container; A drive unit supported on the base and formed to elevate the body portion in a vertical direction; A sensing unit mounted on a lower surface of the body unit and sensing an internal state of the container; And a control unit connected to the sensing unit and the supply unit and controlling an operation of the supply unit by using the detection result of the sensing unit.

It may be included on the lower surface of the body portion, the circulation portion formed to circulate the heat transfer medium in the interior of the container.

An injection part mounted on a lower surface of the body part and connected to the supply part via the body part; It may be mounted on the lower surface of the body portion, the opening and closing portion connected to the recovery portion via the body portion.

The body portion, a hollow cylinder formed of an area and a shape that can cover the upper portion of the container; It may be installed inside the cylinder, one side is connected to the recovery unit, the other side is an inner tube connected to the heat exchange unit.

The heat exchange unit, a heat exchange tube mounted on the lower surface of the tube body, extending downward, an inlet communicating with the tube body, and an outlet connected to the inner tube; It may include; dimples formed on the surface of the heat exchange tube.

The heat exchange tube, a low temperature part extending downward, the upper end of which communicates with the cylinder; A high temperature part extending downward and having an upper end connected to the inner tube; And a connecting part connecting the lower end of the high temperature part and the lower end of the low temperature part.

The supply unit may include a reservoir accommodating the heat exchange medium; A supply pipe connecting the reservoir and the cylinder, and at least partially expandable; It may include a; connected to the reservoir, a driver that provides power to supply the heat exchange medium from the reservoir to the supply pipe.

The recovery unit is mounted on the cylinder body, the communication pipe communicating with the inner tube, and at least a part of the recovery pipe that can be stretched; It may include; a utility connector for connecting the recovery pipe and other process equipment.

The guide portion, the guide bar protruding from the outer circumferential surface of the cylinder, extending downward; It may include; a guide roller mounted to the end of the guide bar so as to contact the outer peripheral surface of the container.

The circulation portion, the driving shaft is mounted to the lower surface of the body portion, extending downward; It may include; a blade mounted to the lower end of the drive shaft.

Heat recovery method according to an embodiment of the present invention, the process of providing a container with an open top; The process of covering the upper portion of the container using the body portion; A process of recovering heat from the container by distributing a heat exchange medium inside the container; It includes; the process of recovering the heat exchange medium from the inside of the container, and when covering the upper portion of the container, using the guide portion to prevent the separation of the body portion.

The process of recovering the heat may include injecting a heat exchange medium into the body and raising the temperature; A process of flowing the heat exchange medium in a heat exchange part disposed inside the container and communicating with the body part; And heat-exchanging the heat exchange medium and the heat transfer medium inside the container to vaporize the heat exchange medium.

And during or before the process of flowing the heat exchange medium, directly spraying the heat exchange medium into the interior of the container through an injection part communicating with the body part.

The process of recovering the heat exchange medium may include discharging the heat exchange medium from the heat exchange unit; It may include; the process of storing the heat exchange medium.

The process of recovering the heat exchange medium may include discharging the heat exchange medium from inside the container; Discharging the heat exchange medium from the heat exchange section; It may include; the process of storing the heat exchange medium.

During the process of vaporizing the heat exchange medium, forcibly circulating the heat transfer medium inside the container; It may include; the process of irregularly inducing the flow of the heat transfer medium on the surface of the heat exchange portion.

The container may contain a ladle, the heat exchange medium may include industrial water, and the heat transfer medium may include air and moisture.

According to the embodiment of the present invention, residual heat can be recovered and recycled from a high-temperature container. At this time, the heat recovery method may be differently selected according to the temperature of the container, and forced convection may be induced in the entire interior of the container, and turbulence may be induced on the surface of the heat exchanger to improve heat recovery efficiency. In addition, it is possible to stably place the device on the container and prevent collision.

For example, when it is applied to a ladle carrying high-temperature molten steel while reciprocating a converter facility and a casting facility, steam can be generated by recovering residual heat from a ladle in a high temperature state received for repair or rebuilding with a refractory kite. Steam can be recycled to the refining process by supplying it to a reflux vacuum degassing plant. At this time, the body portion supported by the heat exchanger can be stably seated on the top of the ladle, preventing collision between the heat exchanger and the ladle, and maintaining a constant distance therebetween.

In addition, when the temperature of the ladle is relatively high, a large amount of water is injected into the inside of the ladle to generate steam directly and quickly inside the ladle, and thereafter, a heat exchanger disposed inside the ladle when the temperature of the ladle is relatively low. Steam can be stably generated by passing water through. In addition, when the temperature of the ladle is equal to or lower than a preset temperature, operation of the apparatus may be terminated to increase operating efficiency.

Alternatively, when the temperature of the ladle is relatively high, a small amount of water is injected into the ladle to supply moisture to the air, which is the heat transfer medium inside the ladle, thereby increasing the density and pressure while reducing heat resistance, and then placed inside the ladle. Steam can be efficiently generated by passing water through an exchanged heat exchanger.

In addition, while passing the water through the heat exchanger disposed inside the ladle to stably generate steam, by forming forced convection inside the ladle, the air inside the ladle actively contacts the inner wall of the container and is evenly mixed within the container to heat Exchange efficiency can be improved. At this time, turbulence may be formed and deepened by using a dimple formed on the surface of the heat exchanger, and the surface frictional force of the heat exchanger and the convection heat transfer rate inside the ladle may be increased.

Accordingly, the cost of the steelmaking process can be reduced and a stable steelmaking process is possible by utilizing the residual heat of the ladle as a resource and utilizing it in a reflux vacuum degassing facility. In addition, it is possible to reduce the time taken for heat recovery, improve heat recovery efficiency, and reduce heat loss.

1 is a schematic diagram of a heat recovery device according to an embodiment of the present invention.
2 is a partial schematic diagram of a heat recovery device according to an embodiment of the present invention.
3 is a partial cross-sectional view of a heat recovery device according to an embodiment of the present invention.
4 is an operation diagram of a heat recovery device according to an embodiment of the present invention.
5 is a partial schematic diagram of a heat recovery device according to a first modification of the present invention.
6 is a partial cross-sectional view of a heat recovery device according to a first modification of the present invention.
7 is a partial schematic diagram of a heat recovery device according to a second modification of the present invention.
8 is a partial cross-sectional view of a heat recovery device according to a second modification of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and will be implemented in various different forms. Only the embodiments of the present invention are provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. The drawings may be exaggerated to describe embodiments of the present invention, and the same reference numerals in the drawings refer to the same elements.

The heat recovery device and the heat recovery method according to an embodiment of the present invention provide technical features that can recover and recover residual heat from a high-temperature container. The heat recovery apparatus according to an embodiment of the present invention may be referred to as a steam production apparatus using residual heat of a ladle, and the heat recovery method according to an embodiment of the present invention may also be referred to as a steam production method using the residual heat of a ladle.

Hereinafter, an embodiment of the present invention will be described based on a ladle carrying high-temperature molten steel while reciprocating the converter facility and the casting facility. Of course, the heat recovery device and the heat recovery method according to an embodiment of the present invention can be applied to various containers in various technical fields.

1 is a schematic diagram of a heat recovery device according to an embodiment of the present invention. 2 is a partial schematic diagram of a heat recovery device according to an embodiment of the present invention. 3 is a partial cross-sectional view of a heat recovery device according to an embodiment of the present invention. 4 is an operation diagram of a heat recovery device according to an embodiment of the present invention.

1 to 4, the heat recovery device according to an embodiment of the present invention will be described in detail.

Heat recovery device according to an embodiment of the present invention, the heat exchange is formed on the lower surface of the body portion 100, the body portion 100, which is disposed on the upper side of the container 10 is opened, the upper portion is formed inside Part 200, the body portion 100 is connected to the inlet of the flow path via the medium, the supply unit 300 for supplying the heat exchange medium (1a) to the flow path, the outlet portion of the flow path through the body portion 100 It is connected, and includes a recovery part 400 for recovering the heat exchange medium 1a from the flow path, and a guide part 700 formed on the body part 100 so that the body part 100 does not deviate from the container 10. do.

In addition, the heat recovery device is supported on the base 500 and the base 500 formed so that the container 10 can be seated, and the body portion 100 is also referred to as a vertical direction ('vertical direction' or 'vertical direction') The drive unit 600 is formed so as to be elevated to be mounted on the lower surface of the body portion 100, the sensing unit 1200 for sensing the internal state of the container 10, the sensing unit 1200 and the supply unit 300 ), And may include a control unit 1100 that controls the operation of the supply unit 300 using the detection result of the detection unit 1200.

The container 10 may include, for example, a ladle. In particular, the container 10 may include a steel ladle for taking molten steel that has been completely refined in a converter refining process.

The container 10 may include an outer shell and a refractory portion. The outer shell may include a bottom plate formed in a disk shape, and a side wall extending around an edge of the bottom plate and protruding a predetermined height upward. The refractory portion may be constructed along the shape of the inner surface on the inner surface of the iron shell.

The container 10 can be open at the top and can be used to store and transport processed materials such as molten steel. When the container 10 is used a predetermined number of times, it can be transported to a work place where a heat recovery device according to an embodiment of the present invention is installed in a high temperature state reaching about 900 ° C to 1000 ° C for repair or rebuilding of the refractory part.

Subsequently, after the container 10 is transferred to the heat recovery device according to an embodiment of the present invention, the container 10 is repaired and rebuilt, for example, in a state cooled to a temperature of 200 ° C. or less or 100 ° C. or less. It can be transported to another work site that can be performed.

The base 500 may be formed so that the container 10 can be seated. The base 500 is installed on the floor 510 of the workplace, the floor 510 of the workplace, and the gantry 520 having vertical frames 521 and horizontal frames 522 and the floor 510 of the workplace. It may include a cart 530 to be installed. The truck 530 is installed on a vehicle body on which the container 10 can be loaded, and a lower portion thereof, and may have a traveling unit including a plurality of wheels to drive the vehicle body.

The vertical frames 521 are spaced apart from each other in the horizontal direction, and may be installed on the floor 510 of the workshop. The horizontal frames 522 may be interconnected in a square frame shape, for example, and may connect the upper ends of the vertical frames 521. Of course, these connection structures are not particularly limited to the above. Meanwhile, the horizontal direction may be a direction crossing the vertical direction.

The container 10 is loaded on the cart 530 and transported between the vertical frames 521 and may be disposed under the driving unit 600. The driving part 600 is supported by the base 500 and may be formed to elevate the body part 100 in the vertical direction. The driving unit 600 is a hoist 610 supported by the horizontal frames 522 of the gantry 520, a wire rope 630 connected to the hoist 610, and a hook that is supported by the wire rope 630 and can be lifted. (620), protruding from the upper surface of the body portion 100, may include a hook 640 that can bind the hook (620).

The above-described base 500 and the driving unit 600 are not particularly limited in the embodiments of the present invention, and their configuration and method may be variously changed.

The body part 100 may be supported by the ring 640 of the driving part 600, and may be disposed on the upper side of the container 100. The body part 100 is installed inside the hollow cylinder 110 and the cylinder 110 formed of an area and a shape that can cover the upper portion of the container 10, and one side is connected to the recovery unit 400 And, the other side may include an inner tube 120 connected to the heat exchange unit 200. The body portion 100 may isolate the inside of the container 10 from outside air while the heat exchange medium 1a and the container 10 exchange heat via the heat transfer medium 2.

The heat exchange medium 1a is a medium for recovering heat from the container 10, and may include industrial water. Of course, the heat exchange medium 1a may be of various types, including water, cooling water, and various working fluids, which are variously used in refrigeration and air conditioning equipment in addition to industrial water.

The heat transfer medium 2 can include air and moisture. Of course, the heat transfer medium 2 may also include dry air. The heat transfer medium 2 can be isolated inside the container 10 by the body portion 100, and receives heat from the container 10 in that state, thereby allowing the heat exchange medium 1a through the heat exchanger 200. ).

A space in which the heat exchange medium 1a can be accommodated may be formed inside the cylinder 110. The cylinder 110 serves to temporarily receive the heat exchange medium 1a and stably supply it to the heat exchange unit 200. The cylindrical body 110 is formed in a shape conforming to the upper shape of the container 10, for example, the outer shape may be formed in a cylindrical shape. The cylinder 100 may be seated on the upper portion of the container 10, and cover an opening formed on the upper portion of the container 10.

The cylinder 110 extends along the edges of the upper plate and the lower plate, the upper plate and the lower plate spaced from each other in the vertical direction, and may include side plates connecting the upper plate and the lower plate. The cylinder 110 may include a metal or alloy material. For example, it may include copper, iron, or various heat-resistant alloy materials. The top plate and the side plate of the cylinder 110 may be coated with a fire-resistant insulating material on at least one of the outer surface and the inner surface to reduce heat loss to the upper side of the container 10.

On the other hand, the heat exchange medium (1a) flowing into the interior of the cylinder 110 is supplied with a predetermined heat from the container 10 through the lower plate of the cylinder 110, heated to a predetermined temperature, and then heat exchange unit (200) ).

The inner tube 120 may provide a passage through which the vaporized heat exchange medium 1b can pass, inside the cylinder 110. The vaporized heat exchange medium 1b is also referred to as a phase shifted heat exchange medium 1b and may include steam.

The inner tube 120 is disposed at the lower side of the collection tube 122 and the collection tube 122 extending in the horizontal direction, the upper end is connected to the collection tube 122, and the lower end is connected to the heat exchanger 200 The lower pipe 121 may be disposed on the upper side of the collection pipe 122, the upper end may be connected to the recovery unit 400, and the lower end may include an upper pipe 123 connected to the collection pipe 122.

The heat exchange medium 1a introduced into the heat exchange unit 200 may be vaporized by exchanging heat with the heat transfer medium 2 while passing through the heat exchange unit 200. At this time, the heat exchange medium 1a may be directly supplied with radiant heat 3 from the container 10. The vaporized heat exchange medium 1b may be introduced into the inner tube 120 and supplied to the recovery part 400.

The heat exchange part 200 is mounted on the lower surface of the body part 100. For example, the heat exchange unit 200 may be mounted on the lower plate of the cylinder 110. The heat exchange part 200 may have a flow path formed therein. The heat exchange unit 200 is mounted on the lower surface of the cylinder 110, extends downward, the inlet communicates with the cylinder 110, and the heat exchange pipe 210, the outlet of which is connected to the inner tube 120, heat It may include a dimple 220 formed on the surface of the exchange tube 210. The heat exchange tube 210 may include, for example, a copper tube material, but is not particularly limited.

The heat exchange tube 210 may be in the form of a U-shaped tube, for example. The heat exchange tube 210 extends downward, and the upper end is mounted on the lower plate of the cylinder 110 and is spaced apart in the horizontal direction from the low-temperature parts 211 and low-temperature parts 211 communicating with the inside of the cylinder 110. , Extended downward, the upper end is mounted on the lower plate of the cylinder 110, the high-temperature part 212 connected to the lower tube 121 of the inner tube 120, the lower part of the high-temperature part 212 and the low-temperature part 211 It may include a connecting part 213 connecting the bottom of the. Here, these parts are pipes for heat exchange, and low and high temperatures mean relative temperatures. The upper end of the high temperature part 212 serves as an outlet of the flow path of the heat exchange pipe 210, and the upper end of the low temperature part 211 serves as an inlet of the flow path of the heat exchange pipe 210.

The heat exchange medium 1a flows through the top of the low temperature part 211 inside the cylinder 110 and flows through the inside of the low temperature part 211, passes through the connection portion 213, and at the bottom of the high temperature part 212 And then, pass through the upper end of the hot part 212 and be supplied to the inner tube 120.

The heat exchange unit 200 may include a plurality of heat exchange tubes 210. Each heat exchange tube 210 may be mounted at the edge of the lower plate of the cylinder 110. The heat exchange tubes 210 may be disposed close to the inner surface of the container 10, and looking at the overall shape, may be arranged in a cylindrical shape corresponding to the inner shape of the container 10.

Of course, the shape and arrangement of the heat exchange tubes 210 are not particularly limited to the above.

A plurality of dimples 220 may be formed on the surface of the heat exchange tube 210. The dimple 220 may increase the contact area between the heat transfer medium 2 and the heat exchange tube 210, and stagnate the flow of the heat transfer medium 2 on the surface of the heat exchange tube 210, or prevent turbulence. Can be induced. Accordingly, the heat transfer efficiency of the heat exchange tube 210 can be improved.

The supply part 300 is connected to the inlet part of the flow path of the heat exchange part 200 via the cylinder 110 of the body part 100 and supplies the heat exchange medium 1a to the flow passage. The supply unit 300 connects the reservoir 310, the reservoir 310, and the cylinder 110 that accommodates the heat exchange medium 1a therein, and at least a part of the flexible supply pipe 330 and the reservoir ( It is connected to 310, it may include a driver 320 that provides power to supply the heat exchange medium (1a) from the storage 310 to the supply pipe (330). One side of the supply pipe 330 may be mounted on the side plate of the cylinder 110 and the other side may be connected to the reservoir 310. The reservoir 310 may include a storage tank capable of storing industrial water. The actuator 320 may include a water supply pump, a compressed air tank, and the like, and can supply industrial water from the reservoir 310 to the supply pipe 330 using various methods.

The recovery part 400 is connected to the outlet part of the flow path of the heat exchange part 200 via the inner tube 120 of the body part 100 and recovers the heat exchange medium 1b vaporized in the flow passage. The recovery unit 400 is mounted on the upper plate of the cylinder 110, communicates with the upper pipe 123 of the inner pipe 120, and at least partially expandable recovery pipe 410, recovery pipe 410 and other processes It may include a utility connector 420 for connecting the equipment. The recovery pipe 410 may include a steam pipe, and a part thereof may be formed to be stretchable. The utility connector 420 may connect another process facility, such as a reflux vacuum degassing facility, and a recovery pipe 410.

The vaporized heat exchange medium 1b passes through the inner tube 120 and flows into the recovery pipe 410, and may be supplied to a reflux vacuum degassing facility through a utility connection tube 420.

The guide portion 700 is formed on the body portion 110 so that the body portion 110 does not deviate from the upper opening of the container 10. Guide portion 700 is projected from the outer circumferential surface of the side plate of the cylinder 110, the guide bar 710 extending downward, the guide mounted to the end of the guide bar 710 to contact the outer circumferential surface of the container 10 Roller 720 may be included.

A plurality of guide parts 700 may be provided, and may be contacted at a plurality of positions on the top of the container 10. The guide bar 710 may have an upper portion extending in a horizontal direction and a lower portion extending in a vertical direction. The guide roller 720 may be mounted on the lower portion of the guide bar 710 so as to contact the outer circumferential surface of the container 10, and when the cylinder 110 is seated on the upper portion of the container 10, the container 10 It can be in contact with the outer peripheral surface. By the guide portion 700, the cylinder 110 can always be seated in place, and thus, the heat exchange portion 200 may not collide with the inner surface of the container 10. By the guide portion 700, the heat exchange portion 200 is spaced a predetermined distance from the inner surface of the container 10 to maintain the gap. That is, the heat exchange unit 200 may be spaced apart at the same distance from the inner surface of the container 10 by the guide unit 700. Accordingly, damage to the heat exchange unit 200 is prevented, and heat transfer to the heat exchange unit 200 can be efficiently performed.

The sensing unit 1200 is mounted on the lower surface of the cylinder 110 of the body unit 100 and can sense the internal state of the container 10. The sensing unit 1200 may include a temperature sensor. Of course, the sensing unit 1200 may further include a pressure gauge or a flowmeter. The sensing unit 1200 may sense the internal state of the container 10, such as temperature, and transmit it to the control unit 1100.

The control unit 1100 may be connected to the sensing unit 1200 and the supply unit 300, and control the operation of the supply unit 300 using the detection result of the sensing unit 1200. That is, the internal temperature of the container 10 is input from the sensing unit 1200 and the operation of the supply unit 300 may be controlled according to the internal temperature. For example, the control unit 1100 may stop the operation of the supply unit 300 when the internal temperature of the container 10 falls below a predetermined temperature, for example, 100 ° C.

5 is a partial schematic diagram of a heat recovery device according to a first modification of the present invention. 6 is a partial cross-sectional view of a heat recovery device according to a first modification of the present invention.

5 and 6, a heat recovery apparatus according to a first modification of the present invention will be described in detail.

The heat recovery device according to the first modification of the present invention is mounted on the lower surface of the body portion 100, and a circulation portion 800 formed to circulate the heat transfer medium 2 inside the container 10 It may further include. The circulation part 800 is mounted on the lower surface of the body part 100 and connected to a drive shaft 810 extending downward, a blade 820 mounted on a lower end of the drive shaft 810, and a drive shaft 810 It may include a driving motor (not shown). The driving shaft 810 may be mounted at the center of the lower plate of the cylinder 110. The drive shaft 810 may be axially rotated by a drive motor. The blade 820 extends in the horizontal direction, rotates axially about the drive shaft 810, and can induce forced convection of the heat transfer medium 2 inside the container 10.

7 is a partial schematic diagram of a heat recovery device according to a second modification of the present invention. 8 is a partial cross-sectional view of a heat recovery device according to a second modification of the present invention.

7 and 8, a heat recovery device according to a second modified example of the present invention will be described in detail.

The heat recovery device according to the second modified example of the present invention further includes a rapid heat exchange unit 900 formed to directly recover heat by spraying the heat exchange medium 1a directly into the container 10. You can. Rapid heat exchange unit 900 is mounted on the lower surface of the body portion 100, the injection portion 910, the body portion 100 connected to the supply unit 300 via the cylinder 110 of the body portion 100 It may be mounted on the lower surface, and may include an opening / closing part 920 connected to the recovery part 400 via the inner tube 120 of the body part 100. In this case, the inner tube 120 may further include an opening / closing tube 124 having an upper end connected to a collection tube 122 and a lower end connected to an opening / closing part 920.

The injection unit 910 may include an injection nozzle 911 mounted on the lower plate of the cylinder 110 and communicating with the interior of the cylinder 110 and an injection valve 912 mounted on the injection nozzle 911. . The injection unit 910 may open the injection valve 912 to directly spray the heat exchange medium 1a inside the cylinder 110 into the container 10. At least one injection unit 910 may be provided.

The opening / closing unit 920 may include an opening / closing nozzle 921 mounted on the lower plate of the cylinder 110 and communicating with the interior of the cylinder 110 and an opening / closing valve 922 mounted on the opening / closing nozzle 921. The opening / closing part 920 may open the opening / closing valve 922 to introduce the vaporized heat exchange medium 1a inside the container 10 into the inner tube 120.

The heat recovery device according to the first modified example of the present invention and the heat recovery device according to the second modified example may be modified in various forms by crossing or combining with each other.

Hereinafter, a ladle apparatus according to an embodiment of the present invention will be described.

The ladle apparatus according to an embodiment of the present invention has a space for receiving a processing object therein, and the container 10 is opened and the heat exchange medium flows inside the container 10, and the container 10 It includes a heat recovery device having a heat exchange unit 200 to recover heat from). Here, the container 10 may include a steel ladle that receives and transports molten steel exiting the converter facility. Further, the heat recovery device may be the above-described heat recovery device according to an embodiment of the present invention.

Hereinafter, a heat recovery method according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8.

Heat recovery method according to an embodiment of the present invention is a heat recovery method for generating a vaporized heat exchange medium (1b) such as steam by using the residual heat of the container 10, the process of providing a container 10 with an open top , The process of covering the upper portion of the container 10 using the body portion 100, the process of recovering heat from the container 10 by distributing the heat exchange medium 1a inside the container 10, the container 10 ) To recover the heat exchange medium (1b) evaporated from the inside, at this time, when covering the upper portion of the container 10, using the guide portion 700 to prevent departure of the body portion 100 do.

The container 10 includes a hot ladle, the heat exchange medium 1a contains industrial water, and the heat transfer medium 2 may contain air and moisture.

First, the container 10 is provided. The container 10 is seated on the bogie 530 and may be provided on the lower side of the body portion 100 by driving the bogie 530. Thereafter, the body portion 100 is lowered to cover the upper portion of the container 10. At this time, the departure of the body portion 100 is prevented by using the guide portion 700. Thereafter, the inside of the container 10 may be isolated from the outside air.

Thereafter, heat exchange medium 1a is circulated inside the container 10 to recover heat from the container 10. In this process, the heat exchange medium (1a) is injected into the body part (100), heated up, and disposed inside the container (10) to communicate with the body part (100). It can be performed through a series of processes in which the heat exchange medium 1a is vaporized by flowing 1a) and heat-exchanging the heat exchange medium 1a and the heat transfer medium 2 inside the container 10. Steam can be generated through this process.

The heat exchange medium 1a is supplied from the supply unit 300 to the body unit 100, and is heated to a predetermined temperature in the body unit 100. Thereafter, the heat exchange medium 1a is supplied from the body portion 100 to the heat exchange portion 200 and changes to a gas state while passing through the heat exchange portion 200.

Thereafter, the heat exchange medium 1b vaporized inside the container 10 is recovered. This process discharges the vaporized heat exchange medium (1b) from the heat exchange unit 200 to the recovery unit 400 through the inner tube 120, the vaporized heat exchange medium (1b) to the utility connector (420) It can be done through a series of storing steps. Steam stored in the utility connector 420 may be used in a reflux vacuum degassing facility.

On the other hand, during the process of flowing the heat exchange medium (1a) to the heat exchange unit 200, or before, the heat exchange medium in the interior of the container 10 through the injection unit 910 communicating with the body portion 100 (1a) can also be injected directly.

For example, when the temperature of the container 10 is relatively high, a large amount of heat exchange medium 1a is injected into the container 10 to quickly generate steam (also referred to as 'steam') inside the container 10. can do. Thereafter, when a predetermined time has elapsed and the temperature of the container 10 is relatively low, steam can be stably generated by passing the heat exchange medium 1a through the heat exchanger 200 disposed inside the container 10. have. In addition, when the temperature of the container 10 is lower than or equal to a preset temperature, the operation of the supply unit 300 may be terminated to increase the operation efficiency. Alternatively, when the temperature of the container 10 is relatively high, heat is transferred by supplying moisture to the heat transfer medium 2 inside the container 10 by spraying a predetermined amount of the heat exchange medium 1a into the inside of the container 10 The heat resistance is reduced while increasing the density and pressure of the medium 2, and then, the heat transfer medium 2 is passed through the heat exchanger 200 disposed inside the container 10 to efficiently generate steam. . That is, heat can be recovered in various ways.

Thereafter, the heat exchange medium 1b vaporized inside the container 10 is recovered. For example, the heat exchange medium 1b evaporated into the inner tube 120 through the opening / closing part 920 inside the container 10 is discharged, and then, the heat exchange medium evaporated from the heat exchange part 200 to the inner tube 120 (1b) can be discharged. Thereafter, the vaporized heat exchange medium 1b may be stored in the utility connector 420. Steam stored in the utility connector 420 may be used in a reflux vacuum degassing facility.

On the other hand, during the process of vaporizing the heat exchange medium (1a) in the heat exchange unit 200, while forcibly circulating the heat transfer medium (2) inside the container (10) using the circulation unit 800, dimples (220) ) To irregularly induce the flow of the heat transfer medium 2 on the surface of the heat exchanger 200. Thus, the heat exchange efficiency can be further improved.

When the internal temperature of the container 10 becomes a predetermined temperature, for example, 100 ° C. or less, the operation of the supply unit 300 is terminated, the body unit 100 is raised, and then the container 10 is repaired and rebuilt in the refractory unit. Transport it to another workshop where possible.

The above embodiments of the present invention are for the purpose of describing the present invention and not for the limitation of the present invention. It should be noted that the configurations and methods disclosed in the above embodiments of the present invention may be modified in various forms by combining or crossing each other, and such modified examples may be viewed as the scope of the present invention. That is, the present invention will be implemented in a variety of different forms within the scope of the claims and equivalent technical spirit, and various embodiments are possible within the scope of the technical spirit of the present invention. Will be able to understand.

10: container 100: body portion
200: heat exchange unit 300: supply unit
400: recovery unit 700: guide unit

Claims (18)

The body portion is disposed on the upper side of the open container;
A heat exchange part mounted on a lower surface of the body part and having a flow path formed therein;
A supply unit connected to the inlet of the flow path via the body portion and supplying a heat exchange medium to the flow path;
A recovery unit connected to the outlet portion of the flow path via the body portion and recovering a heat exchange medium from the flow path; And
It includes; a guide portion formed on the body portion so that the body portion does not deviate from the container;
The body portion,
A hollow cylinder formed in an area and shape capable of covering the upper portion of the container;
It is installed inside the cylinder, one side is connected to the recovery unit, the other side is an inner tube connected to the heat exchange unit; heat recovery device comprising a. The method according to claim 1,
A base formed to seat the container;
A drive unit supported on the base and formed to elevate the body portion in a vertical direction;
A sensing unit mounted on a lower surface of the body unit and sensing an internal state of the container;
And a control unit connected to the sensing unit and the supply unit and controlling an operation of the supply unit using a detection result of the sensing unit. The method according to claim 1,
Heat recovery device comprising a; is mounted on the lower surface of the body portion, the circulation portion formed to circulate the heat transfer medium inside the container. The method according to claim 1,
An injection part mounted on a lower surface of the body part and connected to the supply part via the body part;
Heat recovery device comprising a; mounted on the lower surface of the body portion, the opening and closing portion connected to the recovery portion via the body portion. delete The method according to claim 1,
The heat exchange unit,
A heat exchange tube mounted on a lower surface of the cylinder, extending downward, an inlet communicating with the cylinder, and an outlet connected to the inner tube;
A heat recovery device comprising a dimple formed on the surface of the heat exchange tube. The method according to claim 6,
The heat exchange tube,
A low temperature part extending downwardly and having an upper end communicating with the cylinder;
A high temperature part extending downward and having an upper end connected to the inner tube;
Heat recovery device comprising a; connecting part connecting the lower end of the high-temperature part and the low-temperature part. The method according to claim 1,
The supply unit,
A reservoir accommodating the heat exchange medium;
A supply pipe connecting the reservoir and the cylinder, and at least partially extending and contracting;
And a driver connected to the reservoir and providing power to supply the heat exchange medium from the reservoir to the supply pipe. The method according to claim 1,
The recovery unit,
A recovery pipe mounted on the cylinder, communicating with the inner pipe, and at least partially expandable and retractable;
A heat recovery device comprising a; utility connection pipe connecting the recovery pipe and other process equipment. The method according to claim 1,
The guide portion,
A guide bar protruding from the outer circumferential surface of the cylinder and extending downward;
Heat recovery device comprising a; guide roller mounted to the end of the guide bar so as to contact the outer peripheral surface of the container. The method according to claim 3,
The circulation unit,
A driving shaft mounted on a lower surface of the body portion and extending downward;
Heat recovery device comprising a; blade mounted to the lower end of the drive shaft. Providing a container with an open top;
The process of covering the upper portion of the container using the body portion;
A process of recovering heat from the container by distributing a heat exchange medium inside the container;
The process of recovering the heat exchange medium from the inside of the container; includes,
When covering the upper portion of the container, to prevent the separation of the body portion using a guide portion,
The process of recovering the heat,
A process of injecting a heat exchange medium into the body and heating it up;
A process of flowing the heat exchange medium in a heat exchange part disposed inside the container and communicating with the body part;
And heat-exchanging the heat exchange medium and the heat transfer medium inside the container to vaporize the heat exchange medium. delete The method according to claim 12,
During or before the process of flowing the heat exchange medium,
The process of directly injecting the heat exchange medium into the interior of the container through an injection portion communicating with the body portion. The method according to claim 12,
The process of recovering the heat exchange medium,
Discharging the heat exchange medium from the heat exchange section;
The process of storing the heat exchange medium; heat recovery method comprising a. The method according to claim 14,
The process of recovering the heat exchange medium,
Discharging the heat exchange medium from inside the container;
Discharging the heat exchange medium from the heat exchange section;
The process of storing the heat exchange medium; heat recovery method comprising a. The method according to claim 12,
During the process of vaporizing the heat exchange medium,
Forcibly circulating a heat transfer medium inside the container;
And a process of irregularly inducing the flow of the heat transfer medium on the surface of the heat exchange unit. The method according to claim 12,
The container includes a ladle,
The heat exchange medium contains industrial water,
The heat transfer medium is a heat recovery method comprising air and moisture.

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